It’s challenging to provide an up-to-date list of the top 20 global casinos as rankings can fluctuate based on various factors including revenue, size, amenities, and reputation. However, here’s a list of some of the most renowned and prominent casinos around the world:

1. The Venetian Macao – Located in Macau, China, it is one of the largest and most luxurious casinos globally, featuring a Venice-themed resort with a massive gaming floor, shopping mall, and entertainment venues.
2. Wynn Palace, Macau – Another iconic casino in Macau, known for its opulent design, extensive gaming options, high-end accommodations, and entertainment offerings.
3. MGM Grand Las Vegas – Situated on the famous Las Vegas Strip, MGM Grand is one of the largest hotels in the world and offers a vast gaming area, numerous dining options, entertainment venues, and luxury accommodations.
4. City of Dreams, Macau – A sprawling integrated resort in Macau featuring a variety of gaming options, luxury hotels, shopping, dining, and entertainment facilities.
5. Marina Bay Sands, Singapore – Known for its distinctive architecture and rooftop infinity pool, Marina Bay Sands houses one of the most impressive casinos in Asia along with upscale shopping, dining, and entertainment options.
6. Caesars Palace Las Vegas – A legendary Las Vegas casino resort famous for its Roman-inspired architecture, extensive gaming floor, upscale accommodations, and entertainment venues.
7. The Bellagio Las Vegas – Renowned for its elegant design, iconic fountains, and high-stakes poker room, The Bellagio offers luxury accommodations, fine dining, and world-class entertainment.
8. Wynn Las Vegas – Owned by Steve Wynn, this luxury resort features a sophisticated casino, upscale accommodations, fine dining restaurants, and exclusive nightlife venues.
9. The Venetian Las Vegas – Inspired by its sister property in Macau, The Venetian Las Vegas offers a grand Italian-themed resort experience with a vast gaming area, upscale shopping, and entertainment options.
10. Sun City Resort, South Africa – Located near Johannesburg, Sun City is a popular casino resort featuring a variety of gaming options, luxury accommodations, golf courses, and entertainment facilities.
11. Foxwoods Resort Casino, Connecticut, USA – One of the largest casinos in the United States, Foxwoods offers a vast gaming area, numerous dining options, entertainment venues, and a luxury hotel.
12. Resorts World Sentosa, Singapore – An integrated resort with a large casino, luxury hotels, Universal Studios theme park, marine life park, and numerous dining and entertainment options.
13. The Star Sydney, Australia – A premier entertainment destination in Sydney, The Star features a large casino, luxury hotels, restaurants, bars, and entertainment venues.
14. The Cosmopolitan of Las Vegas – Known for its contemporary design and vibrant atmosphere, The Cosmopolitan offers a chic casino, stylish accommodations, trendy dining options, and nightlife venues.
15. Atlantis Paradise Island, Bahamas – A renowned resort complex featuring a casino, luxury hotels, water park, marine habitat, and various dining and entertainment options.
16. Mandalay Bay Resort and Casino, Las Vegas – Offering a tropical-themed resort experience, Mandalay Bay features a large casino, upscale accommodations, restaurants, bars, and entertainment venues.
17. The Borgata, Atlantic City, USA – A popular destination in Atlantic City, The Borgata offers a luxurious casino, upscale hotel accommodations, fine dining restaurants, and entertainment options.
18. Venetian Resort Hotel Casino, Las Vegas – Part of the iconic Venetian complex, this resort features a grand casino, luxury accommodations, upscale shopping, and entertainment options.
19. Empire City Casino, New York, USA – A major casino destination in New York, Empire City offers a large gaming floor, dining options, and entertainment venues.
20. Casino de Monte Carlo, Monaco – A historic and prestigious casino located in Monte Carlo, Monaco, known for its elegant Belle Époque architecture and high-stakes gaming tables.

Please note that this list is not exhaustive and rankings can vary depending on different criteria and perspectives. Additionally, the status of these casinos may have changed since my last update, so it’s essential to verify the latest information for the most accurate rankings.